ensure attribute value is synchronized such that rerendering the control won’t displace the correct value

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
Set attribute value unconditionally in setValue.
DCO-1.1-Signed-Off-By: Kevin Schaaf <kevin.schaaf@lge.com>
Reviewed-By: Gray Norton <gray.norton@lge.com>
Update version string to 2.3.0-rc.3
Merge branch '2.3.0-release-candidates' into pilot